package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;


    /**
     * 添加套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void insert(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insert(setmeal) ;

        List<SetmealDish> dishes = setmealDTO.getSetmealDishes() ;
        for (SetmealDish dish : dishes) {
            dish.setSetmealId(setmeal.getId());
        }

        setmealDishMapper.insertBatch(dishes) ;
    }

    /**
     * 套餐的分页查询
     * @param queryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO queryDTO) {

        PageHelper.startPage(queryDTO.getPage(),queryDTO.getPageSize());

        Page<SetmealVO> page  = setmealMapper.pageQuery(queryDTO) ;

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据套餐id批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {

        for (Long id : ids) {
            Setmeal setmeal =  setmealMapper.getById (id) ;
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE) ;
            }
        }

        setmealMapper.deleteBatchById(ids) ;
        setmealDishMapper.deleteBatchBySetmealId (ids) ;
    }

    /**
     * 根据id查询套餐信息
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByid(Long id) {

        SetmealVO setmealVO = new SetmealVO();

        Setmeal setmeal = setmealMapper.getById (id) ;
        BeanUtils.copyProperties(setmeal, setmealVO);

        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId (id) ;
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }


    /**
     * 修改套餐信息
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.update(setmeal) ;

        List<SetmealDish> dishes = setmealDTO.getSetmealDishes() ;
        List<Long> setmealIds = new ArrayList<Long>();

        for (SetmealDish dish : dishes) {
            dish.setSetmealId(setmeal.getId());
            setmealIds.add(dish.getSetmealId());
        }

        setmealDishMapper.deleteBatchBySetmealId (setmealIds);

        setmealDishMapper.insertBatch(dishes) ;
    }

    /**
     * 套餐的起售或停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
